Osteogenesis imperfecta is a condition of brittle bones, low muscle mass, and lax joints and ligaments. There are several types of this condition. Specific symptoms depend on the specific type and may include: 1  Blue or gray tint to the whites of the eyes. 2  Thin skin. 3  Curved spine. 4  Breathing problems. 5  Hearing loss.
Ashford Black Marble is the name given to a dark limestone, quarried from mines near Ashford-in-the-Water, in Derbyshire, England.Once cut, turned and polished, its shiny black surface is highly decorative. Ashford Black Marble is a very fine-grained sedimentary rock, and is not a true marble in the geological sense.It can be cut and inlaid with other decorative stones and minerals, using a technique known as pietra dura. Derby Museum has a diagram of Ecton Hill made from Ashford Black Marble and other minerals.shford Black Marble is a very fine-grained sedimentary rock, and is not a true marble in the geological sense.
The marble quarries of Carrara are situated in the valleys of Torano, Miseglia, Bedisano and Colonnata, where both white and coloured marbles are found: the amount of marble is staggering.he marble quarries of Carrara are situated in the valleys of Torano, Miseglia, Bedisano and Colonnata, where both white and coloured marbles are found: the amount of marble is staggering.